Actually, I sort of feel like a betrayal scenario like that is still too similar to manipulation plots so many of the
LoZ games have pulled off. It'd almost feel like a variation of the same plot, y'know? Likewise, betrayal for me is one of those timeless and awesome things in literature, but I'd personally like to see it play in an entirely different way. I mean, other than the
surprise! I'm the bad guy! kind of twist. Instead, why not have a couple of trustworthy characters of a certain journey back-stab Link at some point or have Link himself (maybe by means of game choice) betray one or a handful of characters in the game for some sort of effect?
Choice is becoming like the new dimension in video games, and we can tell even games like
SS seriously wanted to give this sort of thing a shot (although in a wimpy way?). So, yeah, I see things like betrayal sort of playing out like this becoming a really powerful thing for a Zelda game.